The Foreign Affairs Committee of the U.S. House of Representatives has begun considering whether to authorize U.S. military force against Syria in response to last month's chemical attack that killed more than a thousand people. Experts say estimates of how the 435 members of the House are likely to vote show that President Barack Obama may face his toughest legislative battle yet - and one with the highest stakes for U.S. credibility. VOA’s Cindy Saine has the story from Capitol Hill.